In article <Xns9AC0C500062A86650A1FC0D7811DDBC81@[EMAIL PROTECTED]
>,
Rahul <nospam@[EMAIL PROTECTED]
> wrote:
>I just used the following command to get a color map in the blue range
>(based on a long-ago post by Ethan Merrit, thanks Ethan!)
>
>set palette rgbformulae 5, 7, 8 negative
>
>How exactly does this work? I read the help and then dug deeper by `show
>palette rgbformulae`. I see there are those 36 functional forms defined.
>How are these selected? And why do these work? Just seems like "magic" to
>me that the (5,7,8) selection above ( I think: x^3 , sqrt(x) ,
sqrt(sqrt
>(x)) ) leads to a "blue map".
>
>Can someone explain, or perhaps point me to other sources? Just my
>curiosity how this works.
I suggest staring at the output of "test palette".
--
Ethan A Merritt
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